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. 2018 Sep 10;18:92. doi: 10.1186/s12874-018-0552-4

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© The Author(s). 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 2 — Item-person map: Results from the BASIL study (N = 1178 daily observations). Model-estimated item location parameters for each delirium instrument, grouped by rated item, are plotted along the range of delirium intensity. The distribution of delirium intensity scores in the sample is denoted on the bottom of the figure by the purple (DRS-R-98), pink (MDAS), and green (CAM-S) frequency distributions